Preliminary Simulations of Spherical Reflectarrays in Dual Configuration for Satellite Antennas in Ka-Band - Martinez-de-Rioja, D; Rodriguez-Vaqueiro, Y; Pino, A; Martinez-de-Rioja, E; Encinar, JA; Arrebola, M; Toso, G (2020 14th European Conference On Antennas And Propagation (Eucap 2020), 2025)